PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-05:28:00
G05     49.2           15.3                2.0 +/-    1.68       4.9 +/-    1.68  0.160 / 0.300
G10     236.3          12.2                6.1 +/-    2.00      16.3 +/-    2.00  0.090 / 0.290
G13     76.0           36.6                5.5 +/-    0.98       8.5 +/-    0.98  0.120 / 0.280
G15     123.0          52.4                6.8 +/-    0.73       8.3 +/-    0.73  0.130 / 0.350
G16     313.6          12.7                4.7 +/-    2.29      12.5 +/-    2.29  0.090 / 0.280
G20     269.4          67.5                6.8 +/-    0.76       7.3 +/-    0.76  0.110 / 0.340
G21     313.2          47.1                4.0 +/-    0.87       5.3 +/-    0.87  0.140 / 0.380
G25     200.0          11.1                4.2 +/-    5.02      11.5 +/-    5.02  0.370 / 0.390
G26     286.0          20.8                6.2 +/-    1.46      13.3 +/-    1.46  0.050 / 0.050
G29     156.1          72.5                7.9 +/-    1.17       8.2 +/-    1.17  0.050 / 0.050